A, B series of one to?one with your purchase, buy only A paragraph or buy?only B paragraph will can not use.

Dear Customer, please choose your favorite product serial number you buy!

Serial Number: A1??	? Serial Number:?B1
Serial Number:?A2?	Serial Number:?B2
Serial Number: A3??	Serial Number: B3??
Serial Number:?A4?	Serial Number:?B4?
Serial Number:?A5	Serial Number:?B5?
Serial Number:?A6?	Serial Number:?B6?
Serial Number:?A7?	Serial Number:?B7
Serial Number: A8??	Serial Number: B8??
Serial Number: A9??	Serial Number:?B9